Yes. According to UCI rules women are not allowed to compete in the men's race. And women are not allowed to organize a race with the same length as the men. Even just for themselves.
Even though women compete in races like RAAM (Race Across America, ~5000km) and the Transcontinental Race (TCR, ~3500km) and have actually beaten the men at them. Those aren't UCI races because they wouldn't be allowed to join if they were.